Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction and a second direction which are intersected, and the battery pack comprises an exhaust assembly and a plurality of battery monomers arranged along the first direction; a pressure relief piece is arranged on one side of the battery monomer along the second direction; the exhaust assembly is arranged towards the pressure relief piece and is connected with the plurality of single batteries; the exhaust assembly comprises an exhaust part and a plurality of first flow guide parts, the exhaust part is provided with an exhaust channel, a first pressure relief hole and a plurality of exhaust holes which communicate with one another, the exhaust holes are formed at intervals in the first direction, and the first pressure relief hole is formed in one side of the exhaust holes; the exhaust hole is formed in one side, facing the battery monomer, of the exhaust part, and at least part of orthographic projection of the pressure relief piece on the exhaust part is located in the exhaust hole; the plurality of first flow guide parts are arranged in the exhaust channel and are staggered with the plurality of exhaust holes; and each first flow guide part inclines towards the direction close to the first pressure relief hole along one end far away from the battery monomer in the second direction and is arranged at an interval with the inner side wall of the exhaust channel.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery pack and a power utilization device. BACKGROUND

[0002] The battery pack comprises a plurality of batteries, wherein the electrode terminals of the batteries and the explosion-proof valve are usually located on the same side, and the corresponding pressure relief area of thermal runaway and high-low voltage lines are located on the same side of the batteries. In this case, if the batteries are in thermal runaway, the high-temperature eruption material is easy to accumulate in the pressure relief channel, which may cause high-voltage short circuit of the batteries and even spread to the adjacent batteries, resulting in explosion and fire. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims to solve the problem that the pressure relief area of thermal runaway and high-low voltage lines are located on the same side of the batteries in the existing battery pack, which may cause high-voltage short circuit when thermal runaway occurs, and even spread to the adjacent batteries, resulting in explosion and fire. Another object of the application is to provide a power utilization device.

[0004] TECHNICAL SCHEME: The battery pack provided by the application has a first direction and a second direction intersecting each other, and comprises:

[0005] A plurality of battery monomers arranged along the first direction; the battery monomers are provided with a pressure relief member on one side along the second direction and an electrode terminal on the other side along the second direction;

[0006] An exhaust assembly arranged on the side of the battery monomers provided with the pressure relief member and connected with the plurality of battery monomers; the exhaust assembly comprises:

[0007] An exhaust part having an exhaust channel, a first pressure relief hole and a plurality of exhaust holes that are in communication with each other, the plurality of exhaust holes being arranged at intervals along the first direction, and the first pressure relief hole being arranged on one side of the plurality of exhaust holes; the exhaust holes are arranged on the side of the exhaust part facing the battery monomers, and the orthographic projection of the pressure relief member on the exhaust part along the second direction is at least partially located in the exhaust holes;

[0008] A plurality of first flow guide parts arranged in the exhaust channel; the plurality of first flow guide parts are arranged in an interlaced manner with the plurality of exhaust holes and are connected with the exhaust part; one end of each first flow guide part away from the battery monomers along the second direction is inclined toward the direction close to the first pressure relief hole and is arranged at intervals with the inner side wall of the exhaust channel away from the battery monomers.

[0009] In some embodiments,

[0010] The exhaust assembly further comprises a plurality of second flow guides, the plurality of second flow guides are arranged in the exhaust channel and correspond to the plurality of first flow guides respectively, and are arranged on the side away from the first pressure relief hole; along the first direction, the adjacent first flow guide and the second flow guide are arranged between the adjacent two exhaust holes;

[0011] The exhaust part further has a second pressure relief hole in communication with the exhaust channel, and the second pressure relief hole is arranged on the side away from the first pressure relief hole of the plurality of exhaust holes;

[0012] Wherein, one end of each of the second flow guides away from the battery monomer is inclined towards the direction close to the second pressure relief hole, and is arranged in the exhaust channel away from the inner side wall of the battery monomer.

[0013] In some embodiments,

[0014] Along the direction of the exhaust hole close to the first pressure relief hole, the size of the plurality of first flow guides gradually decreases; and / or,

[0015] Along the direction of the exhaust hole close to the second pressure relief hole, the size of the plurality of second flow guides gradually decreases.

[0016] In some embodiments, the exhaust part comprises:

[0017] A first connecting plate connected with the plurality of battery monomers, the plurality of exhaust holes penetrate the first connecting plate along the second direction, and the first flow guide and the second flow guide are connected to the side of the first connecting plate away from the battery monomers;

[0018] A second connecting plate arranged on the side of the first connecting plate away from the battery monomers along the second direction; the first pressure relief hole and the second pressure relief hole penetrate the second connecting plate along the second direction; the second connecting plate is spaced apart from the first flow guide along the second direction, and the second connecting plate is spaced apart from the second flow guide along the second direction; the first connecting plate and the second connecting plate are used to enclose the exhaust channel.

[0019] In some embodiments, the exhaust assembly further comprises a plurality of positioning members spaced apart along the first direction, the plurality of positioning members are connected to the side of the first connecting plate close to the battery monomers, the adjacent two positioning members and the first connecting plate enclose a positioning space, each positioning space is in communication with one exhaust hole, and each battery monomer is partially arranged in one positioning space.

[0020] In some embodiments, the exhaust assembly further comprises:

[0021] A first pressure relief pipe is arranged on the side of the second connecting plate away from the first connecting plate along the second direction and is connected with the second connecting plate. The first pressure relief pipe is in communication with the first pressure relief hole.

[0022] A second pressure relief pipe is arranged on the side of the second connecting plate away from the first connecting plate along the second direction and is connected with the second connecting plate. The second pressure relief pipe is in communication with the second pressure relief hole.

[0023] In some embodiments, the battery pack comprises:

[0024] A box has a receiving cavity in which a plurality of battery cells are arranged. The box comprises a bottom plate for enclosing the receiving cavity. The bottom plate has a first through hole and a second through hole arranged at intervals. The plurality of battery cells are arranged in the receiving cavity. The bottom plate is located on the side of the battery cells provided with the pressure relief member. The exhaust part is arranged between the bottom plate and the plurality of battery cells and is connected with the bottom plate and the plurality of battery cells respectively. The first pressure relief pipe passes through the first through hole, and the second pressure relief pipe passes through the second through hole.

[0025] A first pressure relief valve is arranged on the side of the bottom plate away from the battery cells. The first pressure relief valve is connected with the first pressure relief pipe and covers the first pressure relief pipe.

[0026] A second pressure relief valve is arranged on the side of the bottom plate away from the battery cells. The second pressure relief valve is connected with the second pressure relief pipe and covers the second pressure relief pipe.

[0027] In some embodiments, the battery pack has a third direction intersecting with the first direction and the second direction. The battery pack comprises a plurality of support members arranged at intervals along the third direction. The support members are arranged between the battery cells and the bottom plate and are connected with the battery cells and the bottom plate respectively. Two adjacent support members are connected with one battery cell. The exhaust assembly is located between the two adjacent support members along the third direction and is arranged at intervals with the support members.

[0028] In some embodiments, a plurality of battery cells arranged along the first direction form a battery pack. The battery pack comprises:

[0029] A plurality of battery packs are arranged along the third direction. Each battery pack is connected with two adjacent support members.

[0030] A plurality of exhaust assemblies are arranged along the third direction. Each exhaust assembly is arranged between one battery pack and the bottom plate and is connected with the battery pack and the bottom plate respectively.

[0031] A plurality of first pressure relief valves and a plurality of second pressure relief valves, each of the exhaust assemblies is connected with one of the first pressure relief valves and one of the second pressure relief valves.

[0032] Correspondingly, the power consumption device provided in the embodiments of the present application comprises the battery pack provided in any one of the preceding embodiments.

[0033] Beneficial effects: compared with the prior art, the battery pack provided in the embodiments of the present application has the first direction and the second direction intersecting each other, comprises a plurality of battery monomers and an exhaust assembly, the plurality of battery monomers are arranged along the first direction; the battery monomers are provided with pressure relief members on one side along the second direction; the exhaust assembly is arranged on the side of the battery monomers provided with the pressure relief members and connected with the plurality of battery monomers; the exhaust assembly comprises an exhaust part and a plurality of first flow guide parts, the exhaust part has an exhaust channel, a first pressure relief hole and a plurality of exhaust holes that are in communication with each other, the plurality of exhaust holes are arranged at intervals along the first direction, and the first pressure relief hole is arranged on one side of the plurality of exhaust holes; the exhaust holes are arranged on the side of the exhaust part facing the battery monomers, and the normal projection of the pressure relief member on the exhaust part along the second direction is at least partially located in the exhaust holes; the plurality of first flow guide parts are arranged in the exhaust channel; the plurality of first flow guide parts are arranged in an interlaced manner with the plurality of exhaust holes and are all connected with the exhaust part; one end of each first flow guide part away from the battery monomers along the second direction is inclined toward the direction close to the first pressure relief hole and is arranged at intervals with the inner side wall of the exhaust channel away from the battery monomers. By arranging the plurality of first flow guide parts in the exhaust channel, the high-temperature gas discharged in the thermal runaway can be guided to the first pressure relief hole, so that the thermal runaway gas can flow to the first pressure relief hole quickly and be discharged, and the plurality of first flow guide parts can play a certain blocking role on the high-temperature eruption, so as to reduce the probability of spreading to adjacent batteries, thereby reducing the risk of thermal runaway diffusion and further improving the safety of the battery.

[0034] Compared with the prior art, the power consumption device provided in the embodiments of the present application comprises the battery pack provided in any one of the preceding embodiments. It can be understood that the power consumption device provided in the embodiments of the present application comprises all the technical features and technical effects of the battery pack, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a whole structure schematic diagram of a battery pack provided in the embodiments of the present application;

[0037] Figure 2This is an exploded schematic diagram of a battery pack according to an embodiment of this application;

[0038] Figure 3 This is a cross-sectional view of a battery pack according to an embodiment of this application;

[0039] Figure 4 yes Figure 3 Enlarged view of section A;

[0040] Figure 5 This is a schematic diagram of the overall structure of a battery pack exhaust assembly according to an embodiment of this application;

[0041] Figure 6 This is a cross-sectional view of a venting assembly of a battery pack according to an embodiment of this application;

[0042] Figure 7 yes Figure 6 Enlarged view of section B.

[0043] Reference numerals: 1. Battery cell; 11. Pressure relief component; 12. Electrode terminal; 2. Exhaust assembly; 21. Exhaust section; 211. Exhaust channel; 212. First pressure relief hole; 213. Exhaust port; 214. Second pressure relief hole; 215. First connecting plate; 216. Second connecting plate; 22. First guide section; 23. First gap; 24. Second guide section; 25. Second gap; 26. First pressure relief pipe; 27. Second pressure relief pipe; 28. Positioning component; 281. Positioning space; 3. Housing; 31. Receiving cavity; 32. Base plate; 321. First through hole; 322. Second through hole; 4. First pressure relief valve; 5. Second pressure relief valve; 6. Support component; 10. Battery pack; X, First direction; Z, Second direction; Y, Third direction. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, at least one of which can be one, two or more, unless otherwise specifically limited. In the description of the present application, "vertical" means completely vertical at 90° or almost completely vertical, for example, within an angle range of 80°-100°, it is considered as vertical, similarly, "parallel" means completely parallel or almost completely parallel, for example, within a range of 10° of complete parallel, it is considered as parallel.

[0046] It should be further pointed out that in the drawings of the present application, the arrow marked X indicates the first direction X, the arrow marked Z indicates the second direction Z, and the arrow marked Y indicates the third direction Y. The first direction X, the second direction Z and the third direction Y are introduced to facilitate the description of the structural positional relationship of the battery pack, and to facilitate understanding of the structure. In the embodiments of the present application, the first direction X is the arrangement direction of the plurality of battery monomers; the second direction Z is the height direction of the battery monomer, which is also the arrangement direction of the electrode terminal and the pressure relief member; the third direction Y is the length direction of the battery monomer, which is also the arrangement direction of the battery pack; and the first direction X, the second direction Z and the third direction X intersect with each other, and further, the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0047] At present, the pressure relief member and the electrode terminal of the conventional battery monomer are on the same side, that is, the pressure relief area of thermal runaway and the high and low voltage circuit are in the same direction. When thermal runaway occurs, the high-temperature eruption material sprayed out is easy to accumulate in the pressure relief channel, thereby causing high-voltage short circuit, and also spreading to adjacent battery monomers, causing explosion and fire.

[0048] Therefore, the embodiments of the present application provide a battery pack to solve the above problems.

[0049] Please refer to Figures 1-4The battery pack of the embodiment of the application has intersecting first direction X and second direction Z, and comprises a plurality of battery monomers 1 and an exhaust assembly 2. The plurality of battery monomers 1 are arranged along the first direction X. The battery monomers 1 are provided with pressure relief members 11 on one side along the second direction Z, and are provided with electrode terminals 12 on the other side along the second direction Z. The exhaust assembly 2 is arranged on the side of the battery monomers 1 provided with the pressure relief members 11, and is connected with the plurality of battery monomers 1. The exhaust assembly 2 comprises an exhaust part 21 and a plurality of first flow guide parts 22. The exhaust part 21 has an exhaust channel 211, a first pressure relief hole 212 and a plurality of exhaust holes 213 that are in communication with each other. The plurality of exhaust holes 213 are arranged at intervals along the first direction X, and the first pressure relief hole 212 is arranged on one side of the plurality of exhaust holes 213. The exhaust holes 213 are arranged on the side of the exhaust part 21 facing the battery monomers 1, and the normal projection of the pressure relief members 11 on the exhaust part 21 along the second direction Z is at least partially located in the exhaust holes 213. The plurality of first flow guide parts 22 are arranged in the exhaust channel 211. The plurality of first flow guide parts 22 are arranged in a staggered manner with the plurality of exhaust holes 213, and are connected with the exhaust part 21. One end of each first flow guide part 22 away from the battery monomers 1 is inclined toward the direction close to the first pressure relief hole 212, and is arranged at intervals with the inner side wall of the exhaust channel 211 away from the battery monomers 1.

[0050] In the embodiment of the application, by arranging the exhaust assembly 2 on one side of the pressure relief members 11, the high-temperature molten material and high-temperature gas sprayed out after the pressure relief members 11 are opened when the battery monomers 1 are in thermal runaway are gathered into the exhaust channel 211 and discharged from the first pressure relief hole 212, thereby avoiding direct impact on adjacent battery monomers 1 and improving the safety of the battery. By arranging the plurality of first flow guide parts 22 in the exhaust channel 211, the high-temperature gas discharged in thermal runaway can be guided to the first pressure relief hole 212, thereby facilitating the rapid flow of the thermal runaway gas to the first pressure relief hole 212 and discharge. The plurality of first flow guide parts 22 can also play a certain blocking role for the high-temperature eruption material, thereby reducing the probability of spreading to adjacent batteries, reducing the risk of thermal runaway diffusion, and further improving the safety of the battery.

[0051] Specifically, in the embodiments of the present application, the electrode terminal 12 and the pressure relief member 11 of the battery monomer 1 are located on both sides of the battery monomer 1 along the second direction Z, and when the battery monomer 1 is in thermal runaway, the pressure relief member 11 is opened, and the high-temperature molten material and high-temperature gas generated by thermal runaway are sprayed away from the electrode terminal 12, which facilitates the thermal-electric separation of the battery monomer 1 in thermal runaway and reduces the risk of high-voltage arc of the battery monomer 1 in thermal runaway. In addition, the plurality of first flow guide parts 22 in the exhaust passage 211 are inclined in the same direction and are spaced apart, there is an exhaust hole 213 between the two adjacent first flow guide parts 22, and the end of the first flow guide part 22 away from the battery monomer 1 is spaced apart from the inner side wall of the exhaust passage 211. By such arrangement, the thermal runaway gas can be guided to the first pressure relief hole 212, and the thermal runaway gas can be quickly discharged, and at the same time, the first flow guide part 22 is arranged on both sides of the exhaust hole 213 corresponding to the pressure relief member 11 of the battery monomer 1 in thermal runaway, which can block the high-temperature molten material and prevent the thermal runaway molten material from affecting the adjacent battery monomer 1, reduce the transmission of thermal runaway, and improve the safety of the battery pack.

[0052] In the embodiments of the present application, the pressure relief member 11 can be an explosion-proof valve, and a thinning area can be provided at the edge of the explosion-proof valve to break and burst when subjected to high pressure impact. The exhaust assembly 2 and the battery monomer 1 can be directly glued and sealed by using structural glue or the like, so as to ensure that the high-temperature molten material and high-temperature gas corresponding to the battery in thermal runaway pass through the exhaust hole 213 into the exhaust passage 211.

[0053] In some embodiments, the exhaust assembly 2 further comprises a plurality of second flow guide parts 24, and the plurality of second flow guide parts 24 are arranged in the exhaust passage 211 and correspondingly arranged on the side away from the first pressure relief hole 212 of the plurality of first flow guide parts 22; along the first direction X, the adjacent first flow guide part 22 and the second flow guide part 24 are arranged between the two adjacent exhaust holes 213; the exhaust part 21 further has a second pressure relief hole 214 communicating with the exhaust passage 211, and the second pressure relief hole 214 is arranged on the side away from the first pressure relief hole 212 of the plurality of exhaust holes 213; wherein the end of each second flow guide part 24 away from the battery monomer 1 is inclined toward the direction close to the second pressure relief hole 214 and is spaced apart from the inner side wall of the exhaust passage 211 away from the battery monomer 1.

[0054] In the embodiments of the present application, by arranging a plurality of second flow guide parts 24 spaced apart, the direction of inclination of the second flow guide part 24 is opposite to that of the first flow guide part 22, and the second flow guide part 24 can guide the thermal runaway gas discharged from the exhaust hole 213 on the side away from the first flow guide part 22 to the second pressure relief hole 214, and finally discharge the thermal runaway gas from the second pressure relief hole 214 to the exhaust passage 211.

[0055] It should be noted that the embodiment of the present application preferably provides a plurality of first flow guide portions 22 and a plurality of second flow guide portions 24 arranged from the middle to both ends of the exhaust passage 211, so as to separate the exhaust passage 211 into two parts from the middle, and according to the position of the thermal runaway battery monomer 1, the exhaust gas is discharged to the nearest pressure relief hole, thereby improving the exhaust pressure relief efficiency.

[0056] It should be further noted that the embodiment of the present application provides a plurality of first flow guide portions 22 and a plurality of second flow guide portions 24 arranged in the exhaust passage 211, so as to separate a plurality of exhaust holes 213 by each flow guide portion, and the plurality of first flow guide portions 22 have the same inclination direction and angle, and the plurality of second flow guide portions 24 have the same inclination direction and angle, so that if the exhaust hole 213 for discharging the thermal runaway gas is located on the side of the first flow guide portion 22 close to the first pressure relief hole 212, the first flow guide portion 22 on the side of the exhaust hole 213 away from the first pressure relief hole 212 blocks the thermal runaway gas, and the first flow guide portion 22 on the side of the exhaust hole 213 close to the first pressure relief hole 212 is inclined to the first pressure relief hole 212, which can reduce the blockage of the thermal runaway gas, so as to realize the smooth flow of the thermal runaway gas to the first pressure relief hole 212; if the exhaust hole 213 for discharging the thermal runaway gas is located on the side of the second flow guide portion 24 close to the second pressure relief hole 214, the second flow guide portion 24 on the side of the exhaust hole 213 away from the second pressure relief hole 214 blocks the thermal runaway gas, and the second flow guide portion 24 on the side of the exhaust hole 213 close to the second pressure relief hole 214 is inclined to the second pressure relief hole 214, which can reduce the blockage of the thermal runaway gas, so as to realize the smooth flow of the thermal runaway gas to the second pressure relief hole 214.

[0057] Please refer to Figure 4 , Figure 6 and Figure 7 In some embodiments, the size of the plurality of first flow guide portions 22 gradually decreases in the direction of the exhaust hole 213 close to the first pressure relief hole 212; and / or the size of the plurality of second flow guide portions 24 gradually decreases in the direction of the exhaust hole 213 close to the second pressure relief hole 214.

[0058] In the embodiments of the present application, the sizes of the plurality of first flow guiding portions 22 gradually decrease in the direction along the exhaust hole 213 close to the first pressure relief hole 212, that is, in the direction along the first flow guiding portion 22 close to the first pressure relief hole 212. At this time, the first flow guiding portion 22 located on the side of the exhaust hole 213 close to the first pressure relief hole 212 can further reduce the obstruction of the thermal runaway gas flowing through the first flow guiding portion 22 located on the side of the exhaust hole 213 away from the first pressure relief hole 212, so as to realize more smooth and rapid transmission of the thermal runaway gas to the first pressure relief hole 212. The sizes of the plurality of second flow guiding portions 24 gradually decrease in the direction along the exhaust hole 213 close to the second pressure relief hole 214, that is, in the direction along the second flow guiding portion 24 close to the second pressure relief hole 214. At this time, the second flow guiding portion 24 located on the side of the exhaust hole 213 close to the second pressure relief hole 214 can further reduce the obstruction of the thermal runaway gas flowing through the second flow guiding portion 24 located on the side of the exhaust hole 213 away from the second pressure relief hole 214, so as to realize more smooth and rapid transmission of the thermal runaway gas to the second pressure relief hole 214.

[0059] Specifically, please refer to Figure 6 and Figure 7 , among the two adjacent first flow guiding portions 22, the size of the first flow guiding portion 22 away from the first pressure relief hole 212 in the first direction X is H1 mm, and the size of the first flow guiding portion 22 close to the first pressure relief hole 212 is H2 mm, which satisfies: H1>H2. At this time, after the thermal runaway gas is blocked by the first flow guiding portion 22 with the size of H1 and guided to the first flow guiding portion 22 with the size of H2, the first flow guiding portion 22 with the size of H2 has relatively small obstruction to the thermal runaway gas due to the relatively small size, and the first flow guiding portion 22 with the size of H1 has better obstruction effect to the thermal runaway gas, so that the thermal runaway gas is more smoothly transmitted to the first pressure relief hole 212. Among the two adjacent second flow guiding portions 24, the size of the second flow guiding portion 24 away from the second pressure relief hole 214 in the first direction X is H3 mm, and the size of the second flow guiding portion 24 close to the second pressure relief hole 214 is H4 mm, which satisfies: H3>H4. At this time, after the thermal runaway gas is blocked by the second flow guiding portion 24 with the size of H3 and guided to the second flow guiding portion 24 with the size of H4, the second flow guiding portion 24 with the size of H4 has relatively small obstruction to the thermal runaway gas due to the relatively small size, and the second flow guiding portion 24 with the size of H3 has better obstruction effect to the thermal runaway gas, so that the thermal runaway gas is more smoothly transmitted to the second pressure relief hole 214.

[0060] Meanwhile, it can also be understood that, due to the fact that the gas will flow to the place with small pressure and small resistance after being sprayed out, and in the process, the gas will diffuse in the channel, causing the gas pressure to gradually decrease, at this time, the size of the plurality of first flow guide portions 22 gradually decreases in the direction close to the first pressure relief hole 212, and the size of the plurality of second flow guide portions 24 gradually decreases in the direction close to the second pressure relief hole 214, which will increase the exhaust gap, so as to ensure the exhaust speed. For example, the pressure relief member 11 is opened between two adjacent first flow guide portions 22, at this time, the first flow guide portion 22 close to the first pressure relief hole 212 on the side of the pressure relief member 11 blocks relatively small, and the gas flows more in the direction close to the first pressure relief hole 212, and the gas pressure gradually decreases, and the size of the plurality of first flow guide portions 22 gradually decreases in the direction close to the first pressure relief hole 212, at this time, the gap between the corresponding first flow guide portion 22 and the inner side wall of the exhaust channel 211 away from the battery monomer 1 gradually increases, which can ensure the exhaust speed when the gas pressure decreases.

[0061] In some embodiments, the exhaust portion 21 comprises a first connecting plate 215 and a second connecting plate 216, the first connecting plate 215 is connected with the plurality of battery monomers 1, the plurality of exhaust holes 213 penetrates the first connecting plate 215 in the second direction Z, the first flow guide portion 22 and the second flow guide portion 24 are connected to the side of the first connecting plate 215 away from the battery monomer 1; the second connecting plate 216 is arranged on the side of the first connecting plate 215 away from the battery monomer 1 in the second direction Z; the first pressure relief hole 212 and the second pressure relief hole 214 penetrate the second connecting plate 216 in the second direction Z; the second connecting plate 216 is arranged in the second direction Z away from the first flow guide portion 22, and the second connecting plate 216 is arranged in the second direction Z away from the second flow guide portion 24; the first connecting plate 215 and the second connecting plate 216 are used to enclose the exhaust channel 211.

[0062] In some embodiments, by arranging the first connecting plate 215 and the second connecting plate 216 spaced apart in the second direction Z, the exhaust channel 211 is enclosed, at this time, the first connecting plate 215 is sealingly connected with the battery monomer 1, specifically, the first connecting plate 215 can be sealingly connected by using structural glue or pouring sealant, the first connecting plate 215 is used to fixedly connect the first flow guide portion 22 and the second flow guide portion 24, so as to realize the spaced arrangement of the plurality of first flow guide portions 22 and the plurality of second flow guide portions 24, the second connecting plate 216 is arranged in the second direction Z away from the plurality of first flow guide portions 22 and the plurality of second flow guide portions 24, so as to realize the flow of the thermal runaway gas between the flow guide portion and the second connecting plate 216.

[0063] The first connecting plate 215 and the second connecting plate 216 are arranged to facilitate the formation of the exhaust passage 211, the connection and support of the plurality of first flow guiding portions 22 and the plurality of second flow guiding portions 24, the effective connection of the exhaust portion 21 and the battery monomer 1, and the provision of the flat connecting surface, thereby ensuring the connection contact area and the connection stability.

[0064] In some embodiments, the exhaust assembly 2 further comprises a plurality of positioning members 28 arranged at intervals along the first direction X, each of the plurality of positioning members 28 is connected to the side of the first connecting plate 215 close to the battery monomer 1, and the adjacent two positioning members 28 and the first connecting plate 215 form a positioning space 281, each positioning space 281 is in communication with one exhaust hole 213, and each battery monomer 1 is partially arranged in one positioning space 281.

[0065] In the embodiments of the present application, the positioning member 28 is arranged to position and limit each battery monomer 1, thereby facilitating the alignment of the pressure relief member 11 and the exhaust hole 213 and effectively ensuring the exhaust and pressure relief effect of the pressure relief member 11 to the exhaust hole 213.

[0066] In some embodiments, the exhaust assembly 2 further comprises a first pressure relief pipe 26 and a second pressure relief pipe 27, the first pressure relief pipe 26 is arranged on the side of the second connecting plate 216 away from the first connecting plate 215 along the second direction Z and connected to the second connecting plate 216, and the first pressure relief pipe 26 is in communication with the first pressure relief hole 212; the second pressure relief pipe 27 is arranged on the side of the second connecting plate 216 away from the first connecting plate 215 along the second direction Z and connected to the second connecting plate 216, and the second pressure relief pipe 27 is in communication with the second pressure relief hole 214.

[0067] In the embodiments of the present application, the first pressure relief pipe 26 is arranged in communication with the first pressure relief hole 212 to guide the thermal runaway gas discharged from the first pressure relief hole 212 to the outside of the box 3; the second pressure relief pipe 27 is arranged in communication with the second pressure relief hole 214 to guide the thermal runaway gas discharged from the second pressure relief hole 214 to the outside of the box 3. The arrangement of such structure facilitates the direct outward spraying of the thermal runaway gas and avoids the entry of the thermal runaway gas into the box 3 to affect other battery monomers 1.

[0068] Please refer to Figure 2 , Figure 3 , Figure 5 and Figure 6In some embodiments, the battery pack comprises a box body 3, a first pressure relief valve 4 and a second pressure relief valve 5, the box body 3 has a containing cavity 31, a plurality of battery monomers 1 are arranged in the containing cavity 31, the box body 3 comprises a bottom plate 32 for enclosing the containing cavity 31, the bottom plate 32 has a first through hole 321 and a second through hole 322 arranged at intervals, the plurality of battery monomers 1 are arranged in the containing cavity 31, the bottom plate 32 is located at one side of the battery monomers 1 provided with the pressure relief member 11, the exhaust part 21 is arranged between the bottom plate 32 and the plurality of battery monomers 1 and connected with the bottom plate 32 and the plurality of battery monomers 1 respectively, the first pressure relief pipe 26 is arranged through the first through hole 321, the second pressure relief pipe 27 is arranged through the second through hole 322, the first pressure relief valve 4 is arranged at one side of the bottom plate 32 away from the battery monomers 1, the first pressure relief valve 4 is connected with the first pressure relief pipe 26 and covers the first pressure relief pipe 26, the second pressure relief valve 5 is arranged at one side of the bottom plate 32 away from the battery monomers 1, the second pressure relief valve 5 is connected with the second pressure relief pipe 27 and covers the second pressure relief pipe 27, and the battery monomer 1 comprises an electrode terminal 12, the electrode terminal 12 is arranged at one side of the pressure relief member 11 away from the bottom plate 32 along the second direction Z.

[0069] In the embodiments of the present application, the battery monomer 1 is preferably arranged with the bottom part facing the bottom plate 32, at this time, the pressure relief member 11 faces the bottom plate 32, and the exhaust assembly 2 is arranged between the pressure relief member 11 and the bottom plate 32 and connected with the battery monomer 1 and the bottom plate 32 respectively. At the same time, by arranging the electrode terminal 12 at one side of the pressure relief member 11 away from the bottom plate 32, at this time, the pressure relief member 11 is arranged at one side of the battery monomer 1 away from the electrode terminal 12, and in combination with the arrangement of the exhaust assembly 2, the thermal-electric separation of the battery pack is realized, the pressure relief area of the thermal runaway is avoided to be in the same direction as the high-low voltage circuit, the accumulation of the high-temperature eruption material of the thermal runaway on one side close to the electrode terminal 12 can be avoided, thereby greatly reducing the probability of internal high-voltage arc short circuit and sparking during the runaway, and the safety of the battery pack is effectively improved. By arranging the first through hole 321 and the second through hole 322 on the bottom plate 32, the first pressure relief pipe 26 and the second pressure relief pipe 27 are arranged to pass out of the containing cavity 31 and extend to the outside of the box body 3, at the same time, the first pressure relief valve 4 is connected with one end of the first pressure relief pipe 26 away from the exhaust part 21 to realize the sealing of the first pressure relief pipe 26, and the second pressure relief valve 5 is connected with one end of the second pressure relief pipe 27 away from the exhaust part 21 to realize the sealing of the second pressure relief pipe 27.

[0070] In some embodiments, the battery pack has a third direction Y intersecting the first direction X and the second direction Z, the battery pack comprises a plurality of support members 6 arranged at intervals along the third direction Y, the support member 6 is arranged between the battery monomer 1 and the bottom plate 32 and connected with the battery monomer 1 and the bottom plate 32 respectively, two adjacent support members 6 are connected with one battery monomer 1, and the exhaust assembly 2 is located between the two adjacent support members 6 along the third direction Y and arranged at intervals with the support members 6.

[0071] In the embodiments of the present application, by arranging multiple support members 6 to be spaced apart on both sides of the exhaust assembly 2, stable support of the battery monomer 1 can be achieved, and the internal structure stability of the battery pack can be improved.

[0072] In some embodiments, multiple battery monomers 1 arranged along the first direction X form a battery pack 10, the battery pack includes multiple battery packs 10, multiple exhaust assemblies 2, multiple first pressure relief valves 4 and multiple second pressure relief valves 5, the multiple battery packs 10 are arranged along a third direction Y, and each battery pack 10 is connected with two adjacent support members 6; the multiple exhaust assemblies 2 are arranged along the third direction Y, and each exhaust assembly 2 is arranged between a battery pack 10 and the bottom plate 32 and is connected with the battery pack 10 and the bottom plate 32, respectively; each exhaust assembly 2 is connected with a first pressure relief valve 4 and a second pressure relief valve 5.

[0073] In the embodiments of the present application, by arranging multiple battery packs 10 and multiple exhaust assemblies 2 one-to-one, the pressure relief member 11 of each battery monomer 1 of each battery pack 10 can be opposite to the corresponding exhaust hole 213, so as to timely exhaust and relieve pressure when the battery monomer 1 overheats. Each exhaust assembly 2 is connected with a first pressure relief valve 4 and a second pressure relief valve 5, so as to facilitate the timely discharge of the thermal runaway gas from the exhaust passage 211. The arrangement of such a structure can achieve a larger energy storage capacity of the battery pack, and can simplify the structure of the battery pack, which is conducive to the improvement of the energy density of the battery pack.

[0074] Correspondingly, the power consumption device provided in the embodiments of the present application includes the battery pack as described in any one of the preceding embodiments.

[0075] It can be understood that the power consumption device of the present application includes all the technical features and technical effects of the aforementioned battery pack, which will not be described here.

[0076] Of course, the power consumption device referred to in the present application can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy and an electric plane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc. The embodiments of the present application do not specially limit the above-mentioned power consumption devices.

[0077] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0078] The above describes in detail a battery pack and a power consumption device provided by the embodiments of the present application, and the principles and implementation manners of the present application are described by using specific examples. The above embodiment descriptions are only used to help understand the technical solutions and core ideas of the present application. Those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently. The modifications or replacements do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized by, The first direction and the second direction intersect, comprising: a plurality of battery cells arranged along the first direction; the battery cells are provided with pressure relief members on one side along the second direction, and are provided with electrode terminals on the other side along the second direction; an exhaust assembly provided on the side of the battery cells provided with the pressure relief members and connected with the plurality of battery cells; the exhaust assembly comprises: an exhaust portion having an exhaust channel, a first pressure relief hole and a plurality of exhaust holes in communication with each other, the plurality of exhaust holes are arranged at intervals along the first direction, and the first pressure relief hole is arranged on one side of the plurality of exhaust holes; the exhaust holes are arranged on the side of the exhaust portion facing the battery cells, and the orthographic projection of the pressure relief member on the exhaust portion along the second direction is at least partially located in the exhaust holes; a plurality of first flow guide portions arranged in the exhaust channel; the plurality of first flow guide portions are arranged staggered with the plurality of exhaust holes and are connected with the exhaust portion; one end of each of the first flow guide portions away from the battery cells is inclined towards the direction close to the first pressure relief hole and is arranged at intervals with the inner side wall of the exhaust channel away from the battery cells.

2. The battery pack according to claim 1, wherein: the exhaust assembly further comprises a plurality of second flow guide portions arranged in the exhaust channel and corresponding to one side of the plurality of first flow guide portions away from the first pressure relief hole; adjacent first flow guide portions and second flow guide portions are arranged between adjacent exhaust holes along the first direction; the exhaust portion further has a second pressure relief hole in communication with the exhaust channel, and the second pressure relief hole is arranged on one side of the plurality of exhaust holes away from the first pressure relief hole; wherein one end of each of the second flow guide portions away from the battery cells is inclined towards the direction close to the second pressure relief hole and is arranged at intervals with the inner side wall of the exhaust channel away from the battery cells.

3. The battery pack according to claim 2, wherein: the size of the plurality of first flow guide portions gradually decreases along the direction of the exhaust holes close to the first pressure relief hole; and / or the size of the plurality of second flow guide portions gradually decreases along the direction of the exhaust holes close to the second pressure relief hole.

4. The battery pack of claim 2, wherein, the exhaust portion comprises: a first connecting plate connected with the plurality of battery cells, the plurality of exhaust holes penetrate through the first connecting plate along the second direction, and the first flow guide portions and the second flow guide portions are connected to one side of the first connecting plate away from the battery cells; a second connecting plate arranged on one side of the first connecting plate away from the battery cells along the second direction; the first pressure relief hole and the second pressure relief hole penetrate through the second connecting plate along the second direction; the second connecting plate is arranged at intervals with the first flow guide portions along the second direction, and the second connecting plate is arranged at intervals with the second flow guide portions along the second direction; the first connecting plate and the second connecting plate are used to enclose the exhaust channel.

5. The battery pack of claim 4, wherein, The exhaust assembly further comprises a plurality of positioning members arranged along the first direction, each of the positioning members is connected to the first connecting plate on the side close to the battery cell, and two adjacent positioning members and the first connecting plate form a positioning space, each of the positioning spaces is communicated with one of the exhaust holes, and each of the battery cells is arranged in one of the positioning spaces.

6. The battery pack of claim 4, wherein, The exhaust assembly further comprises: a first pressure relief pipe arranged on the second connecting plate away from the first connecting plate along the second direction and connected to the second connecting plate, and the first pressure relief pipe is communicated with the first pressure relief hole; a second pressure relief pipe arranged on the second connecting plate away from the first connecting plate along the second direction and connected to the second connecting plate, and the second pressure relief pipe is communicated with the second pressure relief hole.

7. The battery pack of claim 6, wherein, The battery pack comprises: a box having a receiving cavity in which the battery cells are arranged, the box comprises a bottom plate for forming the receiving cavity, the bottom plate has first and second through holes arranged at intervals, the battery cells are arranged in the receiving cavity, the bottom plate is located on the side of the battery cells provided with the pressure relief members, the exhaust part is arranged between the bottom plate and the battery cells and connected to the bottom plate and the battery cells respectively, the first pressure relief pipe is arranged through the first through hole, and the second pressure relief pipe is arranged through the second through hole; a first pressure relief valve arranged on the bottom plate away from the battery cells, the first pressure relief valve is connected to the first pressure relief pipe and covers the first pressure relief pipe; a second pressure relief valve arranged on the bottom plate away from the battery cells, the second pressure relief valve is connected to the second pressure relief pipe and covers the second pressure relief pipe.

8. The battery pack of claim 7, wherein, The battery pack has a third direction intersecting with the first direction and the second direction, the battery pack comprises a plurality of support members arranged along the third direction at intervals, the support members are arranged between the battery cells and the bottom plate and connected to the battery cells and the bottom plate respectively, two adjacent support members are connected to one of the battery cells, and the exhaust assembly is arranged between two adjacent support members along the third direction and spaced apart from the support members.

9. The battery pack of claim 8, wherein, A plurality of battery cells arranged along the first direction form a battery pack, and the battery pack comprises: a plurality of battery packs arranged along the third direction, each of the battery packs is connected to two adjacent support members; a plurality of exhaust assemblies arranged along the third direction, each of the exhaust assemblies is arranged between one of the battery packs and the bottom plate and connected to the battery pack and the bottom plate respectively; a plurality of first pressure relief valves and a plurality of second pressure relief valves, each of the exhaust assemblies is connected to one of the first pressure relief valves and one of the second pressure relief valves.

10. An electrical device, characterized by The battery pack comprises the battery pack according to any one of claims 1-9.

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